৬৫০৫২
'Their is three mistake in this sentence' How many mistakes are there in this sentence?
উত্তর
4
৬৫০৫৭
Electric wires should always be well ____ with non-conductive material.
উত্তর
insulated
৬৫০৬০
___ energy may be used in future as a substitute for the fuels found on earth.
উত্তর
Solar